-1.a=-a

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Solution for -1.a=-a equation: 



-1.a=-a

We move all terms to the left:

-1.a-(-a)=0

We add all the numbers together, and all the variables

-1.a-(-1a)=0

We add all the numbers together, and all the variables

-1a-(-1a)=0

We get rid of parentheses

-1a+1a=0

We add all the numbers together, and all the variables

=0

a=0/1

a=0

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